Term 3 · Class 6 Science · Chapter 1

Samacheer Class 6 Science - Magnetism

22 textbook Q&A22 verifiedFree Content

Chapter-wise textbook exercise answers for Magnetism with validation-aware solutions.

Answers marked verified were checked during generation against the chapter context and source question text.
Sections in this chapter
Book Back Questions 5II. Fill in the Blanks 1III. True or False. If False, give the correct answer. 1V. Circle the odd ones and give reasons 3VIII. Give Short Answer 2IX. Answer in detail 2X. Questions based on Higher Order Thinking Skills 2I. Choose the right answer: 2IV. Very Short Answer Questions: 4
Your Progress - Chapter 10% complete
1Book Back Questions5 questions
Q.1An object that is attracted by a magnet.v
  1. A. wooden piece
  2. B. plain pins
  3. C. eraser
  4. D. a piece of paper
Answer:

b. Plain pins

✓ Verified and validated
Q.2People who made mariner’s compass for the first time.v
  1. A. Indians
  2. B. Europeans
  3. C. Chinese
  4. D. Egyptians
Answer:

(c) Chinese

✓ Verified and validated
Q.3A freely suspended magnet always comes to rest in the directionv
  1. A. North-east
  2. B. South-west
  3. C. East-west
  4. D. North-south
Answer:

d. North-South

✓ Verified and validated
Q.4Magnets lose their properties when they arev
  1. A. used
  2. B. stored
  3. C. hit with a hammer
  4. D. cleaned
Answer:

(c) hit with a hammer

✓ Verified and validated
Q.5Mariner’s compass is used to find thev
  1. A. speed
  2. B. displacement
  3. C. direction
  4. D. motion.
Answer:

c. direction

✓ Verified and validated
2II. Fill in the Blanks1 questions
Q.G1Artificial magnets are made in different shapes such as ……….., ………… and ……….. The Materials which are attracted towards the magnet are called ……….. Paper is not a ……….. material. In olden days, sailors used to find direction by suspending a piece of ……….. A magnet always has ………. poles.v
Answer:

Oval shape, Disc Shape, cylindrical shape
magnetic materials
magnetic
lodestone
Two

✓ Verified and validated
3III. True or False. If False, give the correct answer.1 questions
Q.G2A cylindrical magnet has only one pole. Similar poles of a magnet repel each other. Maximum iron filings stick in the middle of a bar magnet when it is brought near them. A compass can be used to find East-West direction at any place. Rubber is a magnetic material.v
Answer:

False – A cylindrical magnet has two poles.
True
False – Maximum iron fillings stick in the poles of a bar magnet when it is brought near them.
False – A. compass can be used to find north-south direction at any place.
False – Rubber is a non-magnetic material.

✓ Verified and validated
4V. Circle the odd ones and give reasons3 questions
Q.1Iron, nail, pins, rubber tube, needlev
Answer:

Iron, nail, pins,needle
Rubber tube is a non-magnetic substance.

✓ Verified and validated
Q.2Lift, escalator, electromagnetic train, electric bulbv
Answer:

Lift, escalator, electromagnetic train,Electromagnet is not used in an electric bulb.

✓ Verified and validated
Q.3Attraction, repulsion, pointing direction, illuminationv
Answer:

Attraction, repulsion, pointing direction,Illumination is not a magnetic property.

✓ Verified and validated
5VIII. Give Short Answer2 questions
Q.1Explain the attraction and repulsion between magnetic poles.v
Answer:

Like poles (N – N, S – S) repel each other.
Unlike poles (N – S, S – N) attract each other.

✓ Verified and validated
Q.2A student who checked some magnets in the school laboratory found out that their magnetic force is worn out. Give three reasons for that?v
Answer:

Magnets lose their properties if they are heated or dropped from a height or hit with a hammer.

✓ Verified and validated
6IX. Answer in detail2 questions
Q.1You are provided with an iron needle. How will you magnetize it?v
Answer:

Place the iron needle on the table.
Take a bar magnet and place one of its poles near one edge of the iron needle.
Rub from one end to another without changing the direction of the pole of the magnet.
Repeat the process 30 to 40 times. The needle will be magnetized.
If it will not attract pin or iron fillings continue the same process for some more time.

✓ Verified and validated
Q.2How does electromagnetic train work?v
Answer:

Electromagnets are used in electromagnetic trains.
Electromagnets are magnetised when current flows through them. When the direction of the current is changed, poles will be changed.
Magnets are attached at the bottom of the train and rail tracks.
The train is lifted from track up to 10 cm height by the property of the same poles repel each other.
By using attraction and repulsion at the same time between the magnets in tracks and bottom of train move forward.
The magnets are controlled by electricity.
There is no friction. So the train can easily attain a speed of 300 km/ h.

✓ Verified and validated
7X. Questions based on Higher Order Thinking Skills2 questions
Q.1You are provided with iron filings and a bar magnet without labelling the poles of the magnet. Using this ………. a. How will you identify the poles of the magnet?v
Answer:

When we place the bar magnet in iron fillings a large number of iron fillings stick on the two ends of the bar magnet. These ends are poles of the magnet.
Poles will attract more iron filings. Because poles have high magnetic strength.
b. Which part of the bar magnet attracts more iron filings? Why?
The more iron filings are attracted by the poles of the magnet because the poles have more concentrated magnetic power.

✓ Verified and validated
Q.3Take a glass of water with a few pins inside. How will you take out the pins without dipping your hands into the water?v
Answer:

Take a bar magnet.
Tie it in a thread.
Dip the tied magnet into the glass of water.
The pins are attracted by the magnet.
Now take out the magnet from the glass of water.
Collect the pins from the magnet.

✓ Verified and validated
8I. Choose the right answer:2 questions
Q.1Which is not attracted by a magnet?v
  1. A. Iron
  2. B. Cobolt
  3. C. Nickel
  4. D. Rubber
Answer:

(d) Rubber

✓ Verified and validated
Q.4Magnets lose their properties if they are _______v
  1. A. dipped in water
  2. B. dipped in oil
  3. C. heated
  4. D. in freezer
Answer:

(c) heated

✓ Verified and validated
9IV. Very Short Answer Questions:4 questions
Q.1What are artificial magnets?v
Answer:

Man-made magnets are called artificial magnets.
(Eg.) bar-magnets, horseshoe magnets.

✓ Verified and validated
Q.2What are the different types of artificial magnets?v
Answer:

Bar-magnet, Horseshoe magnet, Ring magnet and Needle magnet are generally used artificial magnets.
Oval-shape, Disc shape and cylindrical shape magnets are also available.

✓ Verified and validated
Q.3What are magnetic substances?v
Answer:

Substances which are attracted by magnets are called magnetic substances. (Eg.) Iron, Cobolt, Nickel

✓ Verified and validated
Q.4What are non-magnetic substances?v
Answer:

Substances which are not attracted by magnets are called non-magnetic substances. (Eg.) Paper, Plastic etc.

✓ Verified and validated
Back: Ch.7
Next: Ch.2